LITTLE RED LIGHTHOUSE, NYC1.jpg2009 FUJI NEWEST 1.0.jpgIf you're happy with your 1st bike, just stick with that for now. If you develop any problems it will probably be the rear rim.
I'm 200 lbs. and with my riding gear and bike accessories; I'm probably putting on 220 lbs. on my bike(my winter boots alone
I think are over 5 lbs.). I bought my bike brand new and after a month started having problems with the rear rim, popped a
spoke at first then would never stay true after that. Replaced the rim with a more sturdy aero rim(VELOCITY DEEP V), problem solved.
As far as your 2nd bike choice, I would go with the last one, 24 speeds will help you a lot going uphill(compared w/ a 3 or 7 speed).